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IrinaK [193]
3 years ago
7

I needdddd helppppppppp

Mathematics
1 answer:
Aneli [31]3 years ago
5 0

Answer:

B

Step-by-step explanation:

sum of angles in a triangle is 180

6n +1 +108+9n-4=180

15n = 180 -105

15n = 75

n= 75/15 = 5

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